Attachment for typewriters and the like



June 2, I 925.

C. V. SHIPLEY ATTACHMENT FOR TYPENRITERS AND THE LIKE Filed Jan. 19. 1925 ATTORNEY estates ir. Salsas, or s'Aiv samba, cat so "OAKLAND,

'n'il iicfation as ma To a'ZZ wlziomz't may concern: I V

V Befitknown thatlI, CHARLES V. SHIPLEY, a citizen of the United States, residing at San 'Leandro, iii the county of Alameda b and State of California, have invented certain new and useful Improvements in Attachments for Typewriters and the like, of which the following a specification. y This invention relatesto attachments for 1h typewriters and the like, and more partic ;u'larly to an eraser device f'or't'ypewriters wherein the eraser is always at hand for immediate use.

"Ste "ographers and others ,iusi'ag typewriters usually have'dail need foran eraser for the correction of errors, and it is of more. or less constant occurrence to spend time the or an eraser that somewhere the 'deskand usually not many pa rtici lar place; therefore, a search among and under papers is the common procedure fin quest of the eraser, and consequently time is consumed with acorresponding loss of productive work.

Having the i'a eye in view, the prirnary objectfb'f iny invention is'the production of a separate and salable inexpensive article "or 'manufactare, in the form of a'compact eraser device easily attachable to typewriters and wherein the eraser "lnayfbewithdrawn from a station and automatically returned thereto, and consequently when the eraser is not in use it will always be found at the same spot. Another important object is that the device is of such design as to render the mechanism easily accessible; and a further object is to provide the device with a cover having means whereby the cover may be easily turned to regulate the tension for the return of the cord member of the device.

The invention possesses other advantageous features, some of which, with the foregoing, will be set forth at length in the following description where I shall outline in full that form of the invention which I have selected for illustration in the drawings accompanying and forming I art of the present specification. In said rawings I have shown one form of my invention, but it is to be understood that I do not limit myself to such form, since the invention, as expressed in the claims, may be embodied in a plurality of forms.

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19, i925. Serial no. 3,315.

0 cover for the housing.

Fig. 4 (is a face View looking into the housing; the dot-ancLdash lihesindicatethe positionof a pawl in holding engagement.

r '5 is a face viewof one side of the spool showing jpivoted pawls in the recess of the spool; the pawls are shown in the out-'of engagement position.

i. ills, a e g- H are, ASSIGNOR T0 J. H. RIDING, or

' Fig. 6 is a "section through the center of the spool showiiig the-mechanism compactly housed within the spa-e1, r

Fig, 7 is a View similarto Figgfi butof the reverse side of the spool ai' d showiri the nested coil spring; and 'Fig. 8 is aface view-of either end of the coil spring show- 'ing'th'e eyefor p'i'n engagement.

:Fig. 9 is a perspective view (if one of the pawl'sa'nd its projectingstud' 'I-will now describe my invntio n iii detail by referencejnumeralsz 10 in )Fig. 1 represents a corner post or other hounda'ry p'art of a typewriter, and ll the supporting surface for the typewriter.

12 is a plate or frame preferably of sheet material and on which the invention is built. 13 is an anchoring foot formed by bending the plate, and the extreme end of the foot may be chamfered as shown at 14 to allow the foot of the device to be easily pressed under the typewriter post 10, thus the said foot forms a convenient attachment member in this case.

To the upper end of the plate is mounted and secured, as by soldering, a section of cylindrical tubing lfrzformed with a recessed open end 16. This construction forms a housing for the mechanism of my invention, and which housing is completed by a cover 17 adapted to be snugly pressed into the recess 16.

Within the housing is rotatably supported a spool 18 having a grooved cylindrical surface 19 and recessed faces 20 and 21,-and central journals 22 and 23. The latter are supported in bearings 22 and 23 formed as part of the plate 12 and cover 17 respectively. c

In the recess 20 of the spool is mounted a pair of pawls 24 and 25 each provided with a projecting stud 26 at one end for pivotal movement in apertures 27 in the body wall of the spool. The other end 28 of each pawl is made heavy to insure the tooth 29 thereof dropping by gravity, when'in service, into the indent 30 in the bearing 22 of the plate. In the recess 21 of the spool is nested a coil spring 31 having at eachend an eye 32. One eye of the spring is hooked over the pin 33 inthe spool, and the other eye is engaged by the pin 34 fixed in the bearing 23 of the cover and which bearing has a chamfered end 39, and the manner of engagement will be later described.

A suitable cord 35 is attached to the spool in the hole 36 in the wall of the recess 20, and wound in the groove 19 of the spool and passed through a suitable opening 37 in the housing. To the other end of the cord is attached an instrument such as an eraser 38.

In assembly and operation, the spool is wound and with the pawls and spring therein the spool is slipped in the housing and bearing 22, then the bearing of the cover is slipped over the journal 23 and between it and the unengaged endof the coil spring, the chamfered end 39 of the bearing pushing a clearance for the pin 34 when the cover is turned to engage the said pin in the eye of the spring, and the cover is then pressed into the, recess.- The eraser may, then be pulled out, and if the spring tension for the return of the eraser is insuflicient, an instrument such as a nail may be inserted in the notch 40 of the cover (Fig. 3) and the latter turned thereby in the direction of the arrow until the desired tension is attained. When the desired length of cord is unwound for service, the tooth of the uppermost pawl drops by gravity into the indent therefor (Fig. 4:); and to accomplish the return of the eraser,simply give a quick short pull on the cord and centrifugal force induced by the spring, will keep the pawls out of engagement with the-indent.

Having illustrated and describedthe preferred form of my invention, what I claim as new and desire to secure Letters Patent thereon is the following:

In a device of the class described, a sheet metal supporting frame comprising'an upright portion and a horizontal, anchoring foot portion, the upright'portion having a relatively large area at the top thereof, a housing carried by the upper end of the upright portion, one side of said housing closed by a fitted cover plate and the opposite end closed by the said area of the upright portion, a spool in said housing, said spool provided with journals, a bearin formed in the upright portion and in said cover plate for the said journals, said spool having an attached cord adapted to carry an eraser on the free end thereof, the cord being wound upon the spool and adaptedto unwind therefrom through .an opening in the housing, spring means supportedin the.

spool and to the cover plateto restrain the cord in the unwinding therefrom, and further means supported in the spool to check and hold a desired length of the cord unwound from the spool, said latter-means consisting of a pivoted pawlhaving a tooth adapted to engage an indent in the said upright bearing, and the said cover plate provided with an opening for the insertion of means toturn the cover to tighten the said spring restraining means when the spring becomes'weak through service.

In testimony whereof, I affix my signature.

CHARLES v. :SHIPLEY. 

